Opening motors from secondary thread

[thombou]

When using the library in a Qt application, it is impossible to create a motor in a separate thread. Calling apt.Motor() causes the application to crash. without any error.

I am using PyQt5, Python 3.8.5 64bits on Windows 10

[JaiWillems]

I am having a similar problem.

I am able to initialize the thorlabs motor directly through a shell but when I do the same sequence of commands in a script and run the script with python script_name.py, I get the following exception

Exception: Moving velocity failed: Invalid error code.

I am baffled about why the shell vs. script should make a difference. Some insight would be much appreciated. I have added the code below for the function called in a script used to initialize a single thorlabs motor.

def initMotor() -> Motor:
    """
    Defines and instantiates the mode motor.

    This function finds a THORLABS motor connected to the computer and
    initiates the velocity and acceleration constraints. Additionally, the
    motor will be moved to the homing position.

    Parameters
    ----------
    None

    Returns
    -------
    Motor
        Motor object defined by thorlabs_apt.
    """
    devices = apt.list_available_devices()

    try:
        motorSerialNumber = devices[0][1]
    except:
        raise Exception("No motor detected. Ensure the device is connected.")

    # Initialize motor if detected.
    modeMotor = apt.Motor(motorSerialNumber)
    modeMotor.set_move_home_parameters(*modeMotor.get_move_home_parameters())
    modeMotor.set_velocity_parameters(*modeMotor.get_velocity_parameters())
    modeMotor.enable()

    try:
        modeMotor.move_home(True)
    except:
        raise Exception("Motor cannot be homed.")

    return modeMotor

[aidenleefb]

Actually, this is the same error I am facing. I think the problem is the import function. I made a post 5 minutes ago detailing the trouble shooting steps I took